#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int a = 0;
	int b = 0;
	float c = 0;
	float BIM = 0;
	scanf("%d %d", &a, &b);
	c = b/100.0;
	c *= c;
	BIM = a / c;
	printf("%.2f\n", BIM);
	return 0;
}